aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/exif.h
blob: ffacba7e66919a135782d8878b424133e1cfe2eb (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/*
 * EXIF metadata parser
 * Copyright (c) 2013 Thilo Borgmann <thilo.borgmann _at_ mail.de>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * EXIF metadata parser
 * @author Thilo Borgmann <thilo.borgmann _at_ mail.de>
 */

#ifndef AVCODEC_EXIF_H
#define AVCODEC_EXIF_H

#include <stdint.h>
#include "libavutil/dict.h"
#include "bytestream.h"

#define EXIF_MAX_IFD_RECURSION 2
#define EXIF_TAG_NAME_LENGTH   32

struct exif_tag {
    char      name[EXIF_TAG_NAME_LENGTH];
    uint16_t  id;
};

static const struct exif_tag tag_list[] = { // JEITA CP-3451 EXIF specification:
    {"GPSVersionID",               0x00}, // <- Table 12 GPS Attribute Information
    {"GPSLatitudeRef",             0x01},
    {"GPSLatitude",                0x02},
    {"GPSLongitudeRef",            0x03},
    {"GPSLongitude",               0x04},
    {"GPSAltitudeRef",             0x05},
    {"GPSAltitude",                0x06},
    {"GPSTimeStamp",               0x07},
    {"GPSSatellites",              0x08},
    {"GPSStatus",                  0x09},
    {"GPSMeasureMode",             0x0A},
    {"GPSDOP",                     0x0B},
    {"GPSSpeedRef",                0x0C},
    {"GPSSpeed",                   0x0D},
    {"GPSTrackRef",                0x0E},
    {"GPSTrack",                   0x0F},
    {"GPSImgDirectionRef",         0x10},
    {"GPSImgDirection",            0x11},
    {"GPSMapDatum",                0x12},
    {"GPSDestLatitudeRef",         0x13},
    {"GPSDestLatitude",            0x14},
    {"GPSDestLongitudeRef",        0x15},
    {"GPSDestLongitude",           0x16},
    {"GPSDestBearingRef",          0x17},
    {"GPSDestBearing",             0x18},
    {"GPSDestDistanceRef",         0x19},
    {"GPSDestDistance",            0x1A},
    {"GPSProcessingMethod",        0x1B},
    {"GPSAreaInformation",         0x1C},
    {"GPSDateStamp",               0x1D},
    {"GPSDifferential",            0x1E},
    {"ImageWidth",                 0x100}, // <- Table 3 TIFF Rev. 6.0 Attribute Information Used in Exif
    {"ImageLength",                0x101},
    {"BitsPerSample",              0x102},
    {"Compression",                0x103},
    {"PhotometricInterpretation",  0x106},
    {"Orientation",                0x112},
    {"SamplesPerPixel",            0x115},
    {"PlanarConfiguration",        0x11C},
    {"YCbCrSubSampling",           0x212},
    {"YCbCrPositioning",           0x213},
    {"XResolution",                0x11A},
    {"YResolution",                0x11B},
    {"ResolutionUnit",             0x128},
    {"StripOffsets",               0x111},
    {"RowsPerStrip",               0x116},
    {"StripByteCounts",            0x117},
    {"JPEGInterchangeFormat",      0x201},
    {"JPEGInterchangeFormatLength",0x202},
    {"TransferFunction",           0x12D},
    {"WhitePoint",                 0x13E},
    {"PrimaryChromaticities",      0x13F},
    {"YCbCrCoefficients",          0x211},
    {"ReferenceBlackWhite",        0x214},
    {"DateTime",                   0x132},
    {"ImageDescription",           0x10E},
    {"Make",                       0x10F},
    {"Model",                      0x110},
    {"Software",                   0x131},
    {"Artist",                     0x13B},
    {"Copyright",                  0x8298},
    {"ExifVersion",                0x9000}, // <- Table 4 Exif IFD Attribute Information (1)
    {"FlashpixVersion",            0xA000},
    {"ColorSpace",                 0xA001},
    {"ComponentsConfiguration",    0x9101},
    {"CompressedBitsPerPixel",     0x9102},
    {"PixelXDimension",            0xA002},
    {"PixelYDimension",            0xA003},
    {"MakerNote",                  0x927C},
    {"UserComment",                0x9286},
    {"RelatedSoundFile",           0xA004},
    {"DateTimeOriginal",           0x9003},
    {"DateTimeDigitized",          0x9004},
    {"SubSecTime",                 0x9290},
    {"SubSecTimeOriginal",         0x9291},
    {"SubSecTimeDigitized",        0x9292},
    {"ImageUniqueID",              0xA420},
    {"ExposureTime",               0x829A}, // <- Table 5 Exif IFD Attribute Information (2)
    {"FNumber",                    0x829D},
    {"ExposureProgram",            0x8822},
    {"SpectralSensitivity",        0x8824},
    {"ISOSpeedRatings",            0x8827},
    {"OECF",                       0x8828},
    {"ShutterSpeedValue",          0x9201},
    {"ApertureValue",              0x9202},
    {"BrightnessValue",            0x9203},
    {"ExposureBiasValue",          0x9204},
    {"MaxApertureValue",           0x9205},
    {"SubjectDistance",            0x9206},
    {"MeteringMode",               0x9207},
    {"LightSource",                0x9208},
    {"Flash",                      0x9209},
    {"FocalLength",                0x920A},
    {"SubjectArea",                0x9214},
    {"FlashEnergy",                0xA20B},
    {"SpatialFrequencyResponse",   0xA20C},
    {"FocalPlaneXResolution",      0xA20E},
    {"FocalPlaneYResolution",      0xA20F},
    {"FocalPlaneResolutionUnit",   0xA210},
    {"SubjectLocation",            0xA214},
    {"ExposureIndex",              0xA215},
    {"SensingMethod",              0xA217},
    {"FileSource",                 0xA300},
    {"SceneType",                  0xA301},
    {"CFAPattern",                 0xA302},
    {"CustomRendered",             0xA401},
    {"ExposureMode",               0xA402},
    {"WhiteBalance",               0xA403},
    {"DigitalZoomRatio",           0xA404},
    {"FocalLengthIn35mmFilm",      0xA405},
    {"SceneCaptureType",           0xA406},
    {"GainControl",                0xA407},
    {"Contrast",                   0xA408},
    {"Saturation",                 0xA409},
    {"Sharpness",                  0xA40A},
    {"DeviceSettingDescription",   0xA40B},
    {"SubjectDistanceRange",       0xA40C}
//    {"InteroperabilityIndex",      0x1}, // <- Table 13 Interoperability IFD Attribute Information
//    {"",                           0x0}
};

/** Recursively decodes all IFD's and
 *  adds included TAGS into the metadata dictionary. */
int avpriv_exif_decode_ifd(void *logctx, const uint8_t *buf, int size,
                           int le, int depth, AVDictionary **metadata);

int ff_exif_decode_ifd(void *logctx, GetByteContext *gbytes, int le,
                       int depth, AVDictionary **metadata);

#endif /* AVCODEC_EXIF_H */